pagetable.hh revision 8902
1/* 2 * Copyright (c) 2010 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2002-2005 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Ali Saidi 41 */ 42 43#ifndef __ARCH_ARM_PAGETABLE_H__ 44#define __ARCH_ARM_PAGETABLE_H__ 45 46#include "arch/arm/isa_traits.hh" 47#include "arch/arm/utility.hh" 48#include "arch/arm/vtophys.hh" 49#include "sim/serialize.hh" 50 51namespace ArmISA { 52 53struct VAddr 54{ 55 VAddr(Addr a) { panic("not implemented yet."); } 56}; 57 58 59// ITB/DTB page table entry 60struct PTE 61{ 62 void serialize(std::ostream &os) 63 { 64 panic("Need to implement PTE serialization\n"); 65 } 66 67 void unserialize(Checkpoint *cp, const std::string §ion) 68 { 69 panic("Need to implement PTE serialization\n"); 70 } 71 72}; 73 74// ITB/DTB table entry 75struct TlbEntry 76{ 77 public: 78 enum MemoryType { 79 StronglyOrdered, 80 Device, 81 Normal 82 }; 83 enum DomainType { 84 DomainNoAccess = 0, 85 DomainClient, 86 DomainReserved, 87 DomainManager 88 }; 89 90 // Matching variables 91 Addr pfn; 92 Addr size; // Size of this entry, == Type of TLB Rec 93 Addr vpn; // Virtual Page Number 94 uint32_t asid; // Address Space Identifier 95 uint8_t N; // Number of bits in pagesize 96 bool global; 97 bool valid; 98 99 // Type of memory 100 bool nonCacheable; // Can we wrap this in mtype? 101 bool sNp; // Section descriptor 102 103 // Memory Attributes 104 MemoryType mtype; 105 uint8_t innerAttrs; 106 uint8_t outerAttrs; 107 bool shareable; 108 uint32_t attributes; // Memory attributes formatted for PAR 109 110 111 // Access permissions 112 bool xn; // Execute Never 113 uint8_t ap; // Access permissions bits 114 uint8_t domain; // Access Domain 115 116 //Construct an entry that maps to physical address addr for SE mode 117 TlbEntry(Addr _asn, Addr _vaddr, Addr _paddr) 118 { 119 pfn = _paddr >> PageShift; 120 size = PageBytes - 1; 121 asid = _asn; 122 global = false; 123 valid = true; 124 125 vpn = _vaddr >> PageShift; 126 127 nonCacheable = sNp = false; 128 129 xn = 0; 130 ap = 0; // ??? 131 domain = DomainClient; //??? 132 } 133 134 TlbEntry() 135 {} 136 137 void 138 updateVaddr(Addr new_vaddr) 139 { 140 vpn = new_vaddr >> PageShift; 141 } 142 143 Addr 144 pageStart() 145 { 146 return pfn << PageShift; 147 } 148 149 bool 150 match(Addr va, uint8_t cid) 151 { 152 Addr v = vpn << N; 153 if (valid && va >= v && va <= v + size && (global || cid == asid)) 154 return true; 155 return false; 156 } 157 158 Addr 159 pAddr(Addr va) 160 { 161 return (pfn << N) | (va & size); 162 } 163 164 void 165 serialize(std::ostream &os) 166 { 167 SERIALIZE_SCALAR(pfn); 168 SERIALIZE_SCALAR(size); 169 SERIALIZE_SCALAR(vpn); 170 SERIALIZE_SCALAR(asid); 171 SERIALIZE_SCALAR(N); 172 SERIALIZE_SCALAR(global); 173 SERIALIZE_SCALAR(valid); 174 SERIALIZE_SCALAR(nonCacheable); 175 SERIALIZE_SCALAR(sNp); 176 SERIALIZE_ENUM(mtype); 177 SERIALIZE_SCALAR(innerAttrs); 178 SERIALIZE_SCALAR(outerAttrs); 179 SERIALIZE_SCALAR(shareable); 180 SERIALIZE_SCALAR(attributes); 181 SERIALIZE_SCALAR(xn); 182 SERIALIZE_SCALAR(ap); 183 SERIALIZE_SCALAR(domain); 184 } 185 void 186 unserialize(Checkpoint *cp, const std::string §ion) 187 { 188 UNSERIALIZE_SCALAR(pfn); 189 UNSERIALIZE_SCALAR(size); 190 UNSERIALIZE_SCALAR(vpn); 191 UNSERIALIZE_SCALAR(asid); 192 UNSERIALIZE_SCALAR(N); 193 UNSERIALIZE_SCALAR(global); 194 UNSERIALIZE_SCALAR(valid); 195 UNSERIALIZE_SCALAR(nonCacheable); 196 UNSERIALIZE_SCALAR(sNp); 197 UNSERIALIZE_ENUM(mtype); 198 UNSERIALIZE_SCALAR(innerAttrs); 199 UNSERIALIZE_SCALAR(outerAttrs); 200 UNSERIALIZE_SCALAR(shareable); 201 UNSERIALIZE_SCALAR(attributes); 202 UNSERIALIZE_SCALAR(xn); 203 UNSERIALIZE_SCALAR(ap); 204 UNSERIALIZE_SCALAR(domain); 205 } 206 207}; 208 209 210 211} 212#endif // __ARCH_ARM_PAGETABLE_H__ 213 214